OK...have taken my time..read thru everything last 3 months..want to move ahead with upgrading the stock bose...can not do it myself...anyone have any ideas as to a few good sound guys out in the western suburbs of Chicago? We have tweeter but from this forum,not the first place to start. ABT an hour's drive but I'm willing. PS....that hissing in the roadster is NOT your fuel pump...its your audio system...the audiopilot seems to be stuck on, tho Nissan said I was hearing things. Hmmmm....not sb's yet but there were some for 2003....I am sure I will initiating some for 2004!